That's one of the big issues with these kinds of political surveys: Libertarianism isn't a party, but rather a scale similar to conservatism and liberalism. Basically, your libertarian and socialist values would be on one scale and your liberal/conservatism on the other. This is because there have been many Left Libertarians (Like Ghandi, who wanted practically no government involvement in life) as well as socialist conservatives (Stalin, Mao, the Kims of North Korea) but these examples run country to what we typical consider to be left and right issues. It doesn't help that the self styled Libertarian and Socialist parties have latched onto other issues to gain weight.
If it helps, think of Socialism and Libertarianism as where you stand on government involvement in your life economically (and just governmental strength in general), where as liberalism and conservatism are where you stand on social and religious issues.
If it helps, think of Socialism and Libertarianism as where you stand on government involvement in your life economically (and just governmental strength in general), where as liberalism and conservatism are where you stand on social and religious issues.